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US4473113A Expired / Lapsed US ⏱️ 0.0 years remaining

Methods and materials for conducting heat from electronic components and the like

Assignee: CRAYOTHERM Corp
•
Filing: 1982-04-26
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Granted: 1984-09-25
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Expires: 2002-04-26
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Abstract

Abstract A heat conductive material in solid form which is readily excoriated whereby it can be applied by rubbing on the surface to which it is to be applied is formed, in the preferred form, by mixing finely divided heat conducting solids in a waxy material. That material is formed of waxes, or certain fats, and is solid in the range of normal room temperatures. In preferred form, it becomes molten at temperatures in that range just above normal room temperature at which heat generating electronic semi-conductor devices often operate. The mixture is applied at normal room temperature in sheet insulator form by rubbing, or at elevated temperature by painting. It is applied to the surfaces to be mated and across which heat is to be conducted whereupon the surfaces are mated with the coating between them.

Inventors

  • 👤 Fred J. Whitfield
  • 👤 Arthur T. Doyel

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 17:24
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31801

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 60 words
For application to the surfaces of electronic apparatus, a heat conducting an electrically nonconducting sheet of synthetic material having a coating of material on each side of the sheet which coating comprises a material which changes state from solid to liquid form in the temperature range above room temperatures and in the temperature range in which said electronic apparatus operates.
Claim 2
Dependent Claim 60 words
For application to the surfaces of electronic apparatus, a heat conducting an electrically nonconducting sheet of synthetic material having a coating of material on each side of the sheet which coating comprises a material which changes state from solid to liquid form in the temperature range above room temperatures and in the temperature range in which said electronic apparatus operates.

References Cited (Backward Citations)

CA600823A Cited
GB1086003A Cited
US3467547A Cited
US3972821A Cited
US4065908A Cited
US4139051A Cited
US4237086A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-09-25 1988-03-26 1988-09-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-09-25 1992-03-26 1992-09-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-09-25 1996-03-26 1996-09-25 $7700.00 Window Closed / Lapsed

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